<template>
  <div class="app-container">
    <!--查询表单-->
    <el-form :inline="true">
      <el-form-item label="讲师姓名">
        <!-- <el-input v-model="searchObj.name" clearable /> -->
        <el-autocomplete
          v-model="searchObj.name"
          :fetch-suggestions="querySearch"
          :trigger-on-focus="false"
          class="inline-input"
          value-key="name"
          clearable
        />
      </el-form-item>

      <el-form-item>
        <el-select v-model="searchObj.level" clearable placeholder="头衔">
          <el-option value="1" label="高级讲师" />
          <el-option value="2" label="首席讲师" />
        </el-select>
      </el-form-item>

      <el-form-item label="入驻时间">
        <el-date-picker
          v-model="searchObj.joinDateBegin"
          placeholder="开始时间"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-form-item label="-">
        <el-date-picker
          v-model="searchObj.joinDateEnd"
          placeholder="结束时间"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>

      <el-form-item>
        <el-button type="primary" icon="el-icon-search" @click="fetchData()"
          >查询</el-button
        >
        <el-button type="default" @click="resetData()">清空</el-button>
      </el-form-item>
    </el-form>

    <!-- 工具条 -->
    <div style="margin-bottom: 10px">
      <el-button type="danger" size="mini" @click="batchRemove()"
        >批量删除</el-button
      >
    </div>

    <!-- 表格 -->
    <el-table
      :data="list"
      border
      stripe
      @selection-change="handleSelectionChange"
    >
      <el-table-column type="selection" />
      <el-table-column label="ID" width="50">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="joinDate" label="入驻时间" width="160" />
      <el-table-column prop="name" label="名称" width="80" />
      <el-table-column prop="level" label="头衔" width="100">
        <template slot-scope="scope">
          <el-tag v-if="scope.row.level === 1" type="success">高级讲师</el-tag>
          <el-tag v-if="scope.row.level === 2">首席讲师</el-tag>
        </template>
      </el-table-column>
      <el-table-column prop="intro" label="资历" />
      <el-table-column prop="sort" label="排序" width="60" />
      <el-table-column label="操作" width="200">
        <template slot-scope="scope">
          <router-link :to="'/teacher/edit/' + scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit"
              >修改</el-button
            >
          </router-link>
          <el-button size="mini" type="danger" @click="remove(scope.row.id)"
            >删除</el-button
          >
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页组件 -->
    <el-pagination
      :current-page="page"
      :total="total"
      :page-size="limit"
      :page-sizes="[5, 10, 20, 50]"
      style="padding: 30px 0; text-align: center"
      layout="total, sizes, prev, pager, next, jumper"
      @current-change="changeCurrentPage"
      @size-change="changePageSize"
    />
  </div>
</template>

<script>
import {
  pageList,
  removeById,
  batchRemoveByIds,
  selectNameListByKey,
} from "@/api/teacher";

export default {
  data() {
    return {
      list: [], //讲师列表
      total: 0,
      page: 1,
      limit: 5,
      searchObj: {}, //条件查询
      multipleSelection: [], //批量选中的讲师列表
    };
  },
  created() {
    this.fetchData();
  },
  methods: {
    fetchData() {
      pageList(this.page, this.limit, this.searchObj).then((res) => {
        this.list = res.data.records;
        this.total = res.data.total;
      });
    },
    //页码改变时触发
    changeCurrentPage(page) {
      this.page = page;
      this.fetchData();
    },
    //改变每页记录数
    changePageSize(size) {
      this.limit = size;
      this.fetchData();
    },
    // 重置表单
    resetData() {
      this.searchObj = {};
      this.fetchData();
    },
    //删除讲师
    remove(id) {
      // 询问是否删除
      this.$confirm("确定要删除该讲师吗？", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          return removeById(id);
        })
        .then((response) => {
          // 弹出成功提示
          this.$message.success(response.message);
          // 刷新页面
          this.fetchData();
        })
        .catch((response) => {
          if (response === "cancel") {
            this.$message.info("已取消删除");
          }
        });
    },
    //当表格中多选项发生变化的时候触发
    handleSelectionChange(selection) {
      this.multipleSelection = selection;
    },
    //批量删除
    batchRemove() {
      // 判断是否选中记录
      if (this.multipleSelection.length === 0) {
        this.$message.warning("请选择要删除的讲师！");
        return;
      }
      // 询问是否删除
      this.$confirm("确定要删除选中的讲师吗？", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          const idList = [];
          this.multipleSelection.forEach((item) => {
            idList.push(item.id);
          });
          return batchRemoveByIds(idList);
        })
        .then((response) => {
          // 弹出成功提示
          this.$message.success(response.message);
          // 刷新页面
          this.fetchData();
        })
        .catch((response) => {
          if (response === "cancel") {
            this.$message.info("已取消删除");
          }
        });
    },
    //输入建议
    querySearch(queryString, callback) {
      selectNameListByKey(queryString).then((response) => {
        callback(response.data);
      });
    },
  },
};
</script>

<style>
</style>